Poly(lactide)-block-poly(ε-caprolactone-co-ε-decalactone)-block-poly(lactide) copolymer elastomers

Deborah K. Schneiderman, Erin M. Hill, Mark T. Martello, Marc A. Hillmyer

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Batch ring opening transesterification copolymerization of ε-caprolactone and ε-decalactone was used to generate statistical copolymers over a wide range of compositions and molar masses. Reactivity ratios determined for this monomer pair, rCL = 5.9 and rDL = 0.03, reveal ε-caprolactone is added preferentially regardless of the propagating chain end. Relative to poly(ε-caprolactone) the crystallinity and melting point of these statistical copolymers were depressed by the addition of ε-decalactone; copolymers containing greater than 31 mol% (46 wt%) ε-decalactone were amorphous. Poly(lactide)-block-poly(ε-caprolactone-co-ε-decalactone)-block-poly(lactide) triblock polymers were also prepared and used to explore the influence of midblock composition on the temperature dependent Flory-Huggins interaction parameter (χ). In addition, uniaxial extension tests were used to determine the effects of midblock composition, poly(lactide) content, and molar mass on the mechanical properties of these new elastomeric triblocks.

Original languageEnglish (US)
Pages (from-to)3641-3651
Number of pages11
JournalPolymer Chemistry
Volume6
Issue number19
DOIs
StatePublished - May 21 2015

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Publisher Copyright:
© 2015 The Royal Society of Chemistry.

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